Sudden heart rate spike on Sense!?

[AA7777]

Hello,

First off I had this problem also on Ionic. Then I saw FitBit mentioning that they upgraded heart rate reading technology on Sense. So I decided to go ahead and buy it. Now I have it.

But what is going on with the sudden heart rate spike? I know I am heart rate around 75 but then suddenly it reaches over 140 BPM and varies in that range for quite some time. Later it drops back to normal on it's own. I am sure I am wearing the watch correctly.

Fitbit, I really love the design and idea of the smartwatch but such tech issues are not acceptable and is really annoying.

[AA7777]

Really? Other ones not experiencing this? No reply from Fitbit team as well? What am I doing wrong with the watch or I simply should accept the HR technology issues...

[Smoothdome]

I wear a Wahoo chest strap when riding and I'll see disparities between the two over the course of 4 or 5 hours.  Sometimes, usually when my heart rate is around that 75-90 range I'll see spikes into the 130 on the sense.  Other times, usually when the strap is showing 130-140, I'll see numbers 20-30 lower on the Sense.  At the end though, both devices are within 5-10 average beats of each other.  No problem for me.  Just a slight difference in the speed that the Sense picks up the changes.  

[Vicartgray]

so I haven't tried this with the sense, but I know on my old Alta if I washed my hands or the alta itself with hot water it would spike the HR even if I wasn't wearing it.

[tree572]

So I just started experiencing the same thing! My heart rate for the first week wearing it was my usual, mid 60's with a resting around 52. Then, suddenly this past Tuesday, it's 90-100bpm all the time. Nothing has changed for me, whatsoever. Either I'm getting ready to have a heart attack or the tech is bugging out. 

[SunsetRunner]

I experience the same issue with the Sense in the past weeks. In reaches peak to 130 - 140 and then direct back. I contacted customer service about this, but i have no response yet. 

[Landy04]

I don't seem to have the same issue, but have the opposite... I have a RHR in the high 60s - low 70s, and doing a workout, busting my butt off my HR goes up to the 170's, but doesn't activate the peak sections?.

When power walking or cycling, I drift between fat burn and cardio pulse rates.

[rilhia]

I've noticed this with my Sense, but only in certain situations. I have a walking desk and walk all day. Sometimes I rest my wrist on my desk while needing to type with 2 hands (I try to type single handedly for as much as possible to accurately log those steps 😉 ). I also occasionally put my elbow on the desk. It is only when I do this that the Sense buzzes and my heart rate appears to spike to 130-140. My thinking was that I was somewhere trapping the blood flow temporarily by doing this and that it suddenly affects what is observed. It's a pain, but those are the only scenarios in which I see this behaviour.

[EB608]

I've been having the same issue with my Sense. Ot happens randomly every other day or so.  My HR will go up to 140 bpm laying on the couch. I will manually check and my heart rate is around 59 bpm   its causing me alot of health anxiety fitbit!!!!!  I've tried restarting my fitbit but to no avail.